Last night, I sprayed some paint on a couple cards to get a color match, then sprayed a coat of clear on it, and then today, I was looking at them again, and noticed the clear is still soft, you can easily leave a finger print in it, and its still slightly tacky if you hold your finger on it for a second then remove it. When I sprayed them last night, the room was heated to about 60 degrees, and left over night with out the heat on, so the temp fell some (it was about 30 degrees outside overnight). The temp did drop in the room to maybe 50 degrees I guess. Its a new can of hardner, I just got it yesterday. The clear coat is Deltron Concept 2002 clear, using DCX61 hardner. (I used the right hardner). I've used this clear before, and it was hard enough to be able to put the part back on the next day. Im wondering if there is a certain temperature the room has to be, or the hardner will not work, or if its a bad can of hardner?